List questions from equivalence-relations

Published on 25 Mar 2026 - 7:40

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Number of subsets, relations etc of a set

Published on 25 Mar 2026 - 21:44

130

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Number of possible equivalence relations

Published on 22 Mar 2026 - 6:11

103

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Why is $p(z) = \frac{e^z}{1 + e^z} \color{red}{\equiv} \frac{1}{1 + e^{-z}}$ and not $=$?

Published on 20 Mar 2026 - 4:02

50

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Simple question about relations

Published on 22 Mar 2026 - 13:02

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Total number of equivalence class for a set

Published on 20 Mar 2026 - 6:59

49

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Is this an equivalence relation and explaination?

Published on 22 Mar 2026 - 7:48

49

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Partition of a set identified by a equivalence relation

Published on 20 Mar 2026 - 0:34

73

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Define an equivalence relation on $\{ 1,2,3,4 \}^2$ by: (, )(, ) if ⋅ = ⋅ . How many equivalence classes are there?

Published on 22 Mar 2026 - 11:28

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Prove that $\sum_{i=1}^n\lvert[a_i]\rvert$ is even iff $n$ is even

Published on 26 Mar 2026 - 5:38

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Pertaining to the Cardinality of $A$ modulo $R$ for finite $A$.

Published on 20 Mar 2026 - 11:55

377

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Symmetric difference as a equivalent relation-equivalence classes

Published on 24 Mar 2026 - 23:51

57

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An equivalence relation on $\mathbb{R}^2\setminus \{(0,0)\}$ (Resolved)

Published on 26 Mar 2026 - 6:02

53

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Basic algebra exercise

Published on 26 Mar 2026 - 6:00

244

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Question about a specific equivalence relation induced by a diffeomorphism

Published on 22 Mar 2026 - 7:02

List Question

Relations of equivalence...

Number of subsets, relations etc of a set

Number of possible equivalence relations

Why is $p(z) = \frac{e^z}{1 + e^z} \color{red}{\equiv} \frac{1}{1 + e^{-z}}$ and not $=$?

Simple question about relations

Total number of equivalence class for a set

Is this an equivalence relation and explaination?

Partition of a set identified by a equivalence relation

Define an equivalence relation on $\{ 1,2,3,4 \}^2$ by: (, )(, ) if ⋅ = ⋅ . How many equivalence classes are there?

Prove that $\sum_{i=1}^n\lvert[a_i]\rvert$ is even iff $n$ is even

Pertaining to the Cardinality of $A$ modulo $R$ for finite $A$.

Symmetric difference as a equivalent relation-equivalence classes

An equivalence relation on $\mathbb{R}^2\setminus \{(0,0)\}$ (Resolved)

Basic algebra exercise

Question about a specific equivalence relation induced by a diffeomorphism

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